克罗诺的核运输调节了昼夜节律
Qin Zhou1, Yunxia Su1, Ruohan Wang1
1Institute of Health Sciences and Technology, Anhui University, Hefei, Anhui Province, China; Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui Province, China.
The Journal of biological chemistry
|October 25, 2024
概括
昼夜钟蛋白CHRONO通过一种新的信号进入细胞核,Arg63是关键的. 这种核输入对于调节昼夜周期和BMAL1分布至关重要.
科学领域:
- 时间生物学 时间生物学
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
背景情况:
- 昼夜时钟调节生理过程和平衡.
- 时间是哺乳动物昼夜时钟的关键组成部分,对于抑制转录的核入口至关重要.
- CHRONO核进口的机制及其在昼夜调节中的作用以前是未知的.
研究的目的:
- 为了阐明CHRONO核入口的机制.
- 为了识别特定的核定位信号 (NLS) 和参与CHRONO进口的核载体.
- 研究受损CHRONO核进入对昼夜节律和BMAL1定位的功能后果.
主要方法:
- 在CHRONO的N终端中识别了一种新的非经典NLS.
- 核载体的特征,以促进CHRONO进口.
- 在NLS内使用原始编辑对临界氨酸残留物 (Arg63) 的位点定向突变发生.
- 野生类型和R63A突变细胞中昼夜周期长度的分析.
- 在CHRONO淘汰和R63A突变细胞中评估BMAL1的细胞质/核分布.
主要成果:
- 在CHRONO N终端的新型非经典NLS中介于核入口.
- 确定了多个核运输商,以促进CHRONO核进口.
- 在NLS中,Arg63转变为氨酸 (R63A) 显著延长了昼夜周期,模仿了CHRONO敲击.
- 由于CHRONO核进入缺陷导致BMAL1.1的细胞质局部化增加.
结论:
- CHRONO使用了一种新的NLS和核入口进口网络.
- 为了保持正常的昼夜周期长度,CHRONO的核进口是必不可少的.
- 克罗诺核的进入影响BMAL1的亚细胞局部,影响昼夜时钟的功能.
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